Children will be turning everybody and everything into their own knock-knocks. This title is suitable for children aged 6 to 9 years old. Anybody, anywhere and anything becomes a punch line for knock-knock jokes: Knock-Knock! Who's there? Heidi. Heidi who? Heidi Claire, something smells delicious. Try it with Daniella (Daniella so loud, I can hear you just fine). Or, with disguise (Disguise killing me with these knock-knock jokes). Soon you'll turn everybody and everything into your own knock-knocks and you won't be able to stop till somebody knocks you down.